﻿/*
======================================
Date 扩展

======================================
*/
Date.FromMSJsonString = function (value) {
    var d = eval('new ' + (value.replace(/\//g, '')));
    return d;
}

Date.prototype.toShortDateString = function () {
    return this.getFullYear() + "-" + (this.getMonth() + 1).padLeft(2, "0") + "-" + this.getDate().padLeft(2, "0");
}

Date.prototype.toShortTimeString = function () {
    return this.getHours().padLeft(2, "0") + ":" + this.getMinutes().padLeft(2, "0") + ":" + this.getSeconds().padLeft(2, "0");
}

Date.prototype.toDatetimeString = function () {
    return this.toShortDateString() + " " + this.toShortTimeString();
}

/*
======================================
string 扩展

======================================
*/

if (!String.prototype.padLeft)
    String.prototype.padLeft = function (width, char) {
        if (!char) {
            char = " ";
        }

        if (("" + this).length >= width) {
            return "" + this;
        }
        else {
            return arguments.callee.call(char + this, width, char);
        }
    };

if (!String.prototype.padRight)
    String.prototype.padRight = function (width, char) {
        if (!char) {
            char = " ";
        }

        if (("" + this).length >= width) {
            return this + "";
        }
        else {
            return arguments.callee.call(this + char, width, char);
        }
    };

if (!String.prototype.trim)
    String.prototype.trim = function () { return this.replace(/^\s\s*/, '').replace(/\s\s*$/, ''); };

if (!String.prototype.ltrim)
    String.prototype.ltrim = function () { return this.replace(/^\s+/, ''); }

if (!String.prototype.rtrim)
    String.prototype.rtrim = function () { return this.replace(/\s+$/, ''); }

if (!String.prototype.fulltrim)
    String.prototype.fulltrim = function () { return this.replace(/(?:(?:^|\n)\s+|\s+(?:$|\n))/g, '').replace(/\s+/g, ' '); }

/*
======================================
Number 扩展

======================================
*/
Number.prototype.padLeft = function (width, char) {
    if (!char)
        char = "0";
    return (this + "").padLeft(width, char);
};
Number.prototype.padRight = function (width, char) {
    if (!char)
        char = "0";
    return (this + "").padRight(width, char);
};

/*
======================================
Base64 encode / decode 

@author haitao.tu 
@date   2010-04-26
@email  tuhaitao@foxmail.com
======================================
*/
function _Base64() {
    // private property  
    _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

    // public method for encoding  
    this.encode = function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
        input = _utf8_encode(input);
        while (i < input.length) {
            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);
            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;
            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }
            output = output +
            _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
            _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
        }
        return output;
    }

    // public method for decoding  
    this.decode = function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;
        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
        while (i < input.length) {
            enc1 = _keyStr.indexOf(input.charAt(i++));
            enc2 = _keyStr.indexOf(input.charAt(i++));
            enc3 = _keyStr.indexOf(input.charAt(i++));
            enc4 = _keyStr.indexOf(input.charAt(i++));
            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;
            output = output + String.fromCharCode(chr1);
            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }
        }
        output = _utf8_decode(output);
        return output;
    }

    // private method for UTF-8 encoding  
    _utf8_encode = function (string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";
        for (var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if (c < 128) {
                utftext += String.fromCharCode(c);
            } else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            } else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }
        return utftext;
    }

    // private method for UTF-8 decoding  
    _utf8_decode = function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;
        while (i < utftext.length) {
            c = utftext.charCodeAt(i);
            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            } else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            } else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }
        }
        return string;
    }
}
var base64 = new _Base64();